Complete the sentence: 'Because solar and wind power depend on weather conditions, modern power grids require battery storage to prevent ______ in electricity supply.'
Answer and explanation
Correct answer: A. fluctuations
- Step 1: Weather dependence creates instability or variations in generation that storage must smooth out. Step 2. 'Fluctuations' directly denotes irregular shifts or variations. Answer: fluctuations. Why not the others: 'Stability' is what battery storage provides, not what it prevents; 'abundance' is plenty; 'permanence' means lasting state.
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